Sources: 1). "Foster Records: An Account of Thomas Foster of Billerica, Massachusetts...," by F.M. Hawes, 1889, pages 5-6. There appears to be some confusion as to the parents of Jonathan Foster. He is shown as the son of Thomas Foster (1640-1679), page 6. Jonathan is also mentioned on page 5 in such a way as to make no sense to me (AAS 1941-). See photocopies of book. Not clear from this as to his parentage.

Sprague family ancestry, compiled by AAS (1874-1946). This source shows his father as Thomas Foster (1640-????) and being born in Stowe. THIS WILL REQUIRE FURTHER RESEARCH.